CN102095718A - Raman spectrum detecting device based on different polarization and excitation light sources - Google Patents
Raman spectrum detecting device based on different polarization and excitation light sources Download PDFInfo
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- CN102095718A CN102095718A CN 201010604882 CN201010604882A CN102095718A CN 102095718 A CN102095718 A CN 102095718A CN 201010604882 CN201010604882 CN 201010604882 CN 201010604882 A CN201010604882 A CN 201010604882A CN 102095718 A CN102095718 A CN 102095718A
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Abstract
The invention relates to a device for obtaining the Raman spectrum of an object by excitation of different polarized lights. The detecting device comprises a Raman spectrum excitation light source, a combined polarization and excitation device, a detected object, a combined polarizing and receiving device, a Raman detection system and a Raman spectrum signal processing and displaying system. Before reaching the detected object, the light of the Raman spectrum excitation light source firstly passes through the combined polarization and excitation device to generate polarization and excitation light in different states to irradiate the detected object on an objective table, the detected object is excited by the polarization and excitation light in different states to generate a Raman spectrum signal, the Raman spectrum signal is scattered and enters the combined polarizing and receiving device and the Raman detection system, and reaches the Raman spectrum signal processing and displaying system finally, thus a Raman signal of the detected object, which is excited by different polarized light and separated by different polarizations, can be obtained so as to realize accurate analysis of components of the detected object.
Description
Technical field
The present invention relates to a kind of different polarization excitation source that adopts object is carried out the device that Raman spectrum detects.This device is specially adapted to test and obtain the difference of the raman spectral signal of various different objects, to differentiate the different structures of matter or composition.
Background technology
Raman spectroscopy can be from the formation of check and analysis material on the molecular level, and it has directly, advantage such as harmless, quick, and this technology has been widely used in fields such as chemical industry, commodity inspection, environmental protection, biomedicine.At present, the excitation source that Raman spectrum detector commonly used adopts generally adopts nonpolarized light, or single polarized light excites, the Raman spectrum of thus obtained measured object still can not demonstrate fully the subtle change of molecular structure in the material, exploring new Raman spectrum detection technique, is the important research direction of current relevant scientific and technological circle.
Summary of the invention
Task of the present invention just provides the different polarization technology of a kind of comprehensive employing, particularly adopts the Raman spectrum pick-up unit of circular polarization technology as excitation source.
Task of the present invention is achieved in that pick-up unit excites composite set, testee, polarization to receive composite set, Raman detection system and raman spectral signal processing by Raman spectrum excitation source, polarization and constitutes with display system.The Raman spectrum excitation source arrives before the testee, earlier excite composite set by a polarization, with testee on the polarized excitation light irradiation objective table that produces different conditions, exciting composite set rear polarizer exciting light by polarization can be circularly polarized light, linearly polarized light or nonpolarized light.Testee produces raman spectral signal under the exciting of different conditions polarized excitation light, this spectral signal scattering enters polarization and receives composite set, this installs the raman spectral signal of separable acquisition different conditions polarized light, this signal arrives the Raman detection system, arriving raman spectral signal at last handles and display system, thereby can obtain by the different polarization optical excitation, the Raman signal of the testee that separates by different polarization again is with the Accurate Analysis that realizes the testee material is constituted.
Described polarization excites composite set to comprise a rotatable filter wheel with four mounting holes, linear polarizer, left sheet, circular polarizing disk or right circular polarizing disk are placed in respectively wherein on three mounting holes, have the filter wheel of four mounting holes by rotation, can produce the exciting light of linear polarization, left, right circular polarization and unpolarized four kinds of states.This filter wheel has been realized having guaranteed the stability of experiment condition to greatest extent to carrying out in real time between the optical element of different passages, switching easily, has been significantly reduced experimental error.
Describedly comprise a rotatable filter wheel with three mounting holes.Two mutually perpendicular linear polarizer of polarization angle are placed in respectively wherein on two mounting holes, have the filter wheel of three mounting holes, the raman spectral signal of separable acquisition different polarization state by rotation.This filter wheel has been realized having guaranteed the stability of experiment condition to greatest extent to carrying out in real time between the optical element of different passages, switching easily, has been significantly reduced experimental error.
Described polarization excites composite set and polarization to receive composite set and can use simultaneously or use separately according to the experiment needs.
Description of drawings
Fig. 1 is a principle of the invention synoptic diagram.
Fig. 2 is that polarization excites four holes in the composite set can revolve the synoptic diagram of filter wheel.
Fig. 3 is the synoptic diagram that filter wheel can be revolved in three holes in the polarization reception composite set.
1 is excitation source among Fig. 1; The 2nd, polarization excites composite set; The 3rd, testee; The 4th, objective table; The 5th, polarization receives composite set; The 6th, the Raman detection system; The 7th, raman spectral signal is handled and display system.
Among Fig. 2, the 8th, can revolve filter wheel first mounting hole; 9 is second mounting holes; 10 is the 3rd mounting holes; 11 is the 4th mounting holes, can settle linear polarizer, left sheet and right circular polarizing disk respectively; The 4th mounting hole can be left a blank.
Among Fig. 3, the 12nd, filter wheel first mounting hole can be revolved in three holes in the polarization reception composite set, and 13 is second mounting holes, and 12 and 13 can settle a linear polarizer respectively, and two linear polarizer polarization angles are orthogonal.14 is the 3rd mounting holes, and the 3rd mounting hole can be left a blank.
Embodiment
The device of accompanying drawing 1,2 will become the main device that novel Raman spectrum detects, and be used for the Raman spectrum of testee is detected.
As shown in Figure 1, the light that sends when excitation source 1, when exciting composite set 2 through polarization, excite filter wheel in the composite set by rotatory polarization, light is passed through from different mounting holes selectively, because settled linear polarizer, left sheet and right circular polarizing disk respectively at first, second, third mounting hole in advance in the mounting hole, mounting hole 4 is left a blank.Therefore can utilize polarization to excite composite set 2 to produce the exciting light of linear polarization, left, right circular polarization and unpolarized four kinds of states as required.When this exciting light arrives on objective table 4 testee 3, testee 3 sends corresponding raman spectral signal and receives composite set 5 by polarization again, also can receive filter wheel in the composite set 5 by rotatory polarization, light is passed through selectively, owing to settled the mutually perpendicular linear polarizer of polarization angle in advance respectively in first, second mounting hole from different mounting holes.Therefore can utilize polarization to receive composite set 5 and separate the sample raman spectral signal that obtains the different polarization state as required.This signal is received by Raman detection system 6, handle and display system 7 by raman spectral signal again, can obtain the different raman spectral signal of sample under different polarization excites, thus can be from this signal, the structure or the composition of further object analysis.
According to the experiment needs, can be separately or use polarization to excite composite set and polarization to receive composite set simultaneously to obtain sample message.
Claims (4)
1. Raman spectrum pick-up unit based on the different polarization excitation source, it is characterized in that pick-up unit is by the Raman spectrum excitation source, polarization excites composite set, testee, polarization receives composite set, Raman detection system and raman spectral signal are handled with display system and are constituted, the Raman spectrum excitation source arrives before the testee, earlier excite composite set by a polarization, with testee on the polarized excitation light irradiation objective table that produces different conditions, exciting composite set rear polarizer exciting light by polarization can be circularly polarized light, linearly polarized light or nonpolarized light; Testee produces raman spectral signal under the exciting of different polarization states exciting light, this spectral signal scattering enters polarization and receives composite set, this installs the raman spectral signal of separable acquisition different conditions polarized light, this signal arrives the Raman detection system, arriving raman spectral signal at last handles and display system, thereby can obtain by the different polarization optical excitation, the Raman signal of the testee that separates by different polarization again is with the Accurate Analysis that realizes the testee material is constituted.
2. the Raman spectrum pick-up unit based on the different polarization excitation source according to claim 1, it is characterized in that described polarization excites composite set to comprise a rotatable filter wheel with four mounting holes, linear polarizer, left sheet, circular polarizing disk or right circular polarizing disk are placed in respectively wherein on three mounting holes.
3. the Raman spectrum pick-up unit based on the different polarization excitation source according to claim 1, it is characterized in that described polarization receives composite set and comprises a rotatable filter wheel with three mounting holes, two mutually perpendicular linear polarizer of polarization angle are placed in respectively wherein on two mounting holes.
4. the Raman spectrum pick-up unit based on the different polarization excitation source according to claim 1 is characterized in that polarization excites composite set, polarization to receive composite set and can be used in combination, and also can use separately.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010604882 CN102095718A (en) | 2010-12-25 | 2010-12-25 | Raman spectrum detecting device based on different polarization and excitation light sources |
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| CN 201010604882 CN102095718A (en) | 2010-12-25 | 2010-12-25 | Raman spectrum detecting device based on different polarization and excitation light sources |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806823A (en) * | 2015-01-21 | 2016-07-27 | 佐信科技有限公司 | Integrated raman spectrum measurement system and modularized laser module |
| CN106908390A (en) * | 2015-12-23 | 2017-06-30 | 高准精密工业股份有限公司 | Optical devices |
| CN107179308A (en) * | 2016-03-11 | 2017-09-19 | 中国科学院苏州纳米技术与纳米仿生研究所 | A kind of determining instrument and its assay method for polarizing Raman spectrum |
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| CN101661144A (en) * | 2009-07-30 | 2010-03-03 | 福建师范大学 | Polarizing/filter wheel which is used in multichannel polarized light and channel filtering system and has adjustable angle |
| CN101806740A (en) * | 2010-04-19 | 2010-08-18 | 福建师范大学 | Detection method of human plasma surface enhanced raman spectroscopy by integrating main component analysis |
| CN201993313U (en) * | 2010-12-25 | 2011-09-28 | 福建师范大学 | Novel Raman spectrum detecting device |
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- 2010-12-25 CN CN 201010604882 patent/CN102095718A/en active Pending
Patent Citations (6)
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| WO2000039546A1 (en) * | 1998-12-29 | 2000-07-06 | Nikolai Petrovich Akimov | Device for the remote measurement of the optical and physical parameters of objects |
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| US20070263218A1 (en) * | 2006-05-10 | 2007-11-15 | The United States Of America As Represented By The Army | Rapid 4-Stokes parameter determination via stokes filter |
| CN101661144A (en) * | 2009-07-30 | 2010-03-03 | 福建师范大学 | Polarizing/filter wheel which is used in multichannel polarized light and channel filtering system and has adjustable angle |
| CN101806740A (en) * | 2010-04-19 | 2010-08-18 | 福建师范大学 | Detection method of human plasma surface enhanced raman spectroscopy by integrating main component analysis |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105806823A (en) * | 2015-01-21 | 2016-07-27 | 佐信科技有限公司 | Integrated raman spectrum measurement system and modularized laser module |
| TWI570402B (en) * | 2015-01-21 | 2017-02-11 | 佐信科技有限公司 | Integrated raman spectrum measurement system and modularized laser module |
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| CN107179308A (en) * | 2016-03-11 | 2017-09-19 | 中国科学院苏州纳米技术与纳米仿生研究所 | A kind of determining instrument and its assay method for polarizing Raman spectrum |
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Application publication date: 20110615 |